// Copyright 2001-2016 Crytek GmbH / Crytek Group. All rights reserved.

#ifndef __JSMN_H_
#define __JSMN_H_

/**
 * JSON type identifier. Basic types are:
 *  o Object
 *  o Array
 *  o String
 *  o Other primitive: number, boolean (true/false) or null
 */
typedef enum
{
	JSMN_PRIMITIVE = 0,
	JSMN_OBJECT    = 1,
	JSMN_ARRAY     = 2,
	JSMN_STRING    = 3
} jsmntype_t;

typedef enum
{
	/* Not enough tokens were provided */
	JSMN_ERROR_NOMEM = -1,
	/* Invalid character inside JSON string */
	JSMN_ERROR_INVAL = -2,
	/* The string is not a full JSON packet, more bytes expected */
	JSMN_ERROR_PART  = -3,
	/* Everything was fine */
	JSMN_SUCCESS     = 0
} jsmnerr_t;

/**
 * JSON token description.
 * @param		type	type (object, array, string etc.)
 * @param		start	start position in JSON data string
 * @param		end		end position in JSON data string
 */
typedef struct
{
	jsmntype_t type;
	int        start;
	int        end;
	int        size;
#ifdef JSMN_PARENT_LINKS
	int        parent;
#endif
} jsmntok_t;

/**
 * JSON parser. Contains an array of token blocks available. Also stores
 * the string being parsed now and current position in that string
 */
typedef struct
{
	unsigned int pos;      /* offset in the JSON string */
	int          toknext;  /* next token to allocate */
	int          toksuper; /* superior token node, e.g parent object or array */
} jsmn_parser;

/**
 * Create JSON parser over an array of tokens
 */
void jsmn_init(jsmn_parser* parser);

/**
 * Run JSON parser. It parses a JSON data string into and array of tokens, each describing
 * a single JSON object.
 */
jsmnerr_t jsmn_parse(jsmn_parser* parser, const char* js,
                     jsmntok_t* tokens, unsigned int num_tokens);

#endif /* __JSMN_H_ */
